Method and apparatus for manufacturing combs and other toothed articles



METHOD AND AP ARATUS FOR MANUFA Aug. R4, H923. L464fi4 H SCHEL-HAMMER cTuR'me COMBS AND OTHER 'roo'rusn ARTICLES Filed Dec. 14 1921 IN VENTOR A ORNEY Patented Aug. 1d, 1923.

HERMAN SGHELHAMMEB, or wrinrnsronnnennrne, new YOBK, AssIGnoR To arena rice;

AMERICAN HARD Bonner, co, or new YcnK, N. Y,, A coaronnrioiu on NEW YORK.

METHOD'AND APPARATUS non MANUFACTURING COMES AND OTHER Too r'Hnn 7 ARTICLES.

' Application filed December 14, 1921. Serial No. 522,310;

To all whom it may concern:

Be it known that I, HERMAN SCI-IELHAM- MER, a citizen of the United States of America, and a resident of Whitest-one Landing, in the county of Queens and State of New 'York, have invented new and useful Method and Apparatus for Manufacturing Combs and Other Toothed Articles, of'which'the following is a specification. 7

My invention relates to themanufacture of combs and similarly toothed articles and involves process which comprises forming a comb blank with depressed portions or recesses corresponding-to the gaps between the teeth, said portions providing webs of relatively thin cross sectional area corresponding to such gaps; and removing such webs by grinding with a grinder or plurality of grinders having thecontour'of the shape of the gap between adjacent teeth. The invention further involvesa method of producing combs of varying types which first consists in forming'a blank from which the teeth are to be cut with web portions of less thickness than the adjacent portions which. are relatively thicker and form the teeth, said web portions being adapted'to' become the gaps between said teeth; and

finally removing such web p'ortionsby feed' ing the blank substantially axially against grinding wheels, or vice versa, whereby the advancement of the blank or grinding wheels causes the side surfacesof the grind ing wheels to continue to operate upon the opposite faces of the adjacent teeth to smooth and polish the same as the peripheral cutting portion of the grinding wheel acts to remove said web portions of the blank.

The invent-ion has for a further object the provision of a machine for cutting comb blanks, including in combination, a grinding wheel or wheels provided with a rounded peripheral cutting edge, and side cutting surfaces extending progressively outward from said peripheral cutting edge towardgthe centre. of the wheel due to a gradual axial thickening of the wheel toward its axis.

In the drawings Figure 1 is a plan view of a comb cutting machine, with parts omitted. provided with a grinding wheel for cutting the teeth of combs, vention.

made in accordance with the ina Figure 2 is an enlarged detail view with parts-broken away of a partially cut comb, showing a portion of the grinding wheel in section.

-.Referring to the drawings 1 designates the-frame of a comb cutting machine, which may be of any desired construction, the same i isten being provided with a suitable comb clamp '2 in which is removably held a comb blank 3 in which it is desired to cut the teeth.

Supported in suitable bearings 4 and 5 of the frame 1 is a cutter shaft6, which is arranged to be rotated through the medium of a belt 7. The cutter shaft 6 is providedwith a grinding wheel.8, secured thereto, which is adapted to be fed into engagement with the comb blank 3 in order to cut the teeth therein."

The means for feeding the grinding wheel 8 in relation to the comb blank 3 are not shown or described asany well known means can be used for this-purpose.

The grinding wheel 8, in accordance with the present invention, is preferably made of suitable abrasive material, such as emery,

carborundum, or thelike, of sufl'icient hardness to readily cut the teeth of combs.

The grinding wheel 8 is, in accordance with the present invention, formed so that the cross sectional area of the wheel will.

correspond with and'have the same contour as the cut out portions to be formed between the comb teeth. l 1

By referring to Figure 2 it will be seen that the comb blank .3 is stamped, in the present instance, leaving uncut portions or webs 9 between the teeth, the grindingwheel 8, as shown, being'made of suitable cross-section a1 area to remove the webs. The reb portions 9 when initially stamped, molded or otherwise formed, produce recesses corresponding to the gaps between the teeth, said recessed portions providing relat vely thin web portions of the blank adjacent the thicker tooth portions thereof, through which web portions the grinding I means can rapidly move without excessive frictional resistance or vibration.

In the present instance the grinding wheel 8 is provided witha relatively thin periphery having a rounded edge, the sides of the grinding wheel extending slightly outward toward the centre due to a gradual thickening of the yvhee-l toward its axis-solthat the cross sectional area of the same ivill be progressively narrow toward;

th en d p riph ry-i 5 QIIFrOinW'heabOve description it ill Elie V s eengthat [thegrinding Wheel; made" as above idescrlbedfivill, as t entersthe Web or space F; bet vv eenf thecomb teethicut not only along the periphery of the-grinding Wheel;

the teeth onthe periphery. i

' 7 It is also to be noted that due sive-ly thinner toward. its outer peripheryit ing both the appearance and action of the 7 'The provision of the rounded edge on the periphery of the grinding wheel produces a rounded edge at the base of the teeth rein N forcing theqbas'e' of'thc teeth mahingthem lessif-liable to break. The rounded edge at the base of the teethmakes the com-basier to keep cleanas there arevno sharp corners *to collect dirt The rounded edge atxthe ba sevoi the teethf'also improves the appear{ it ance of'the comb, giving-fit a more artistic appearance. 7 i V A. grinding Wheel made as aboveudescribed will cut tentimes asmany' comb teeth,' in blanks made of hard rubber for example, as will a steel saw Withoutresharpeningl, I

A grinding wheel made 'as-above' described ber blank, for example, much smoother thereby doing'away with a great deal of the polishing ordinarily employed when steel saws aroused. The same 1s also much betjtenadapted to cutting the teeth of large v particularlyadapted for use infcutting the teethiofhardrubber blanksfin hichthe 10 along the sides as well, thereby afio'irding' a more uniform" cutting and;smootlilng tionupon the innermost portions of opposite v faces-oil? adjacent teeth than is the case'vvith;

- a teel savzywheregall Ethe-cutting-is done v to the fact that the IIIHllIN 'WlIQGl is madero 'resb t D i will torni the teeth of the comb so" thatthey 'W The-thinner at: the outeriends; improv- 1 'Will also act to cut theteeth in 'a harcl'i-rub I -v combs as the grinding Wheel Will not'chip the 7 teeth are either stampedzoi was tamp -id, 211- 7 though thef'samecan be iusedcwith equal ad vantage on comb blanks made of other maia q 1' a Whi'le' -Tthe invention =.bee n 1 described ithfparticular reference a;- thecjdetails' of construction, the same is nQttOjbe con. sidered as limitcd thereto fish-Milly Changes can be made and still l'all within the scope of the invention set fforth in the followa c a ms f; 1; 1

VWhat I claim is:-

l. The =methodof-{making combs which consists in forming a fcomb blank v'ithrecesse's correspondingito the gaps between theteeth leaving Webs corresponding :to such gaps, and i 'emoving such Webs lay-grinding 3 with a grinder or, tou'nof the sha peiiof the ga V a. QZ'rThe method .of making cokbsi comprising. the forming-,of a comb blankwith WehPOltlOllS adaptedto become thegaps between the teeth, and removing such web portions by feeding'the blank substantially axially. against a grinding vv-heel orwheels, said iwheelsbeingformed with peripheral cutting portions and side cutting surfaces, '1

whereby the advancement of the -blanh or v the :vice 'ver'sa action of the'g' fding heel causes the side cutting surf-acestoi continue 80 to cut the-[oppos te facesfof'a'djajcentteeth as h pe ph al cu ing. portions act tofremove said web portions ofthebia'nk Z V 3; .A,-c01nb cutting 'machine for cutting the't'eeth of comb blanks, comprisingii'ii combination .aj'girinding Wheel havingiial rounded peripheral cutting edgepand side '1- cutting's'urfaces extendingprogressively out Ward from said, ro-undedper ipheral cutting edge toward the centre of saidwheel due to a; gradual 2 axial thickening of ;the Wheel toward its-axis; 4 =1 A In tiesti-monywhereofl have signed this specification in the presence of two suhscri'b-l ing-vvitnessesq Witnesses: v

GEORGEfCSTRACHAN Wm; B. 1

HERMA 

